Alert archive / Pennsylvania / Mesoscale Discussions in 2009
Mesoscale Discussion 1007
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2009, 3:40 PM EDT for 12 counties in New York; 29 counties in Pennsylvania. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2009, 3:40 PM EDT (19:40 UTC)
- Expired
- Jun 9, 2009, 4:45 PM EDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 41 counties
Broome County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Madison County, NY, Montgomery County, NY, Otsego County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Adams County, PA, Berks County, PA, Bradford County, PA, Carbon County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Monroe County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, York County, PA
The radar
The State College radar (KCCX), 111 km from the middle of the area, began a volume at 19:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.7 hours before the alert went out and 178 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1272 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 6:01 AM EDT | Mesoscale Discussion | SPC | Bronx, Kings, New York, Orange, Putnam, Queens and 5 more | 59 min |
| Jun 9, 11:48 AM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 9 more | 87 min |
| Jun 9, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | Broome, Chenango, Delaware, Fulton, Herkimer, Montgomery and 4 more | 6 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2009Mesoscale Discussions in New York, 2009Every mesoscale discussion in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.